Because it takes away CNN's "spuriously edited footage" retort.
Which is exactly what Brian Stelter's spuriously edited CNNMoney preview story repeated twice regarding Project Veritas prior scalp-takings...
It is also because there is a recent successful model for releasing raw data: Wikileaks proved that group-sourcing thousands of people on Twitter to determine which of the Podesta emails were the most heinous/relevant in destroying Cankles' campaign.
No, they should release both a well-edited video and the raw backup.
And Wikileaks themselves have been looking at and trying to do more punchy reporting from their data, rather than just raw dumps.